1*4bdff4beSrobert // -*- C++ -*- 2*4bdff4beSrobert //===----------------------------------------------------------------------===// 3*4bdff4beSrobert // 4*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 6*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*4bdff4beSrobert // 8*4bdff4beSrobert //===----------------------------------------------------------------------===// 9*4bdff4beSrobert 10*4bdff4beSrobert #ifndef _LIBCPP___MEMORY_CONCEPTS_H 11*4bdff4beSrobert #define _LIBCPP___MEMORY_CONCEPTS_H 12*4bdff4beSrobert 13*4bdff4beSrobert #include <__concepts/same_as.h> 14*4bdff4beSrobert #include <__config> 15*4bdff4beSrobert #include <__iterator/concepts.h> 16*4bdff4beSrobert #include <__iterator/iterator_traits.h> 17*4bdff4beSrobert #include <__iterator/readable_traits.h> 18*4bdff4beSrobert #include <__ranges/access.h> 19*4bdff4beSrobert #include <__ranges/concepts.h> 20*4bdff4beSrobert #include <__type_traits/is_reference.h> 21*4bdff4beSrobert #include <__type_traits/remove_cvref.h> 22*4bdff4beSrobert 23*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24*4bdff4beSrobert # pragma GCC system_header 25*4bdff4beSrobert #endif 26*4bdff4beSrobert 27*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 28*4bdff4beSrobert 29*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 30*4bdff4beSrobert 31*4bdff4beSrobert namespace ranges { 32*4bdff4beSrobert 33*4bdff4beSrobert // [special.mem.concepts] 34*4bdff4beSrobert 35*4bdff4beSrobert // This concept ensures that uninitialized algorithms can construct an object 36*4bdff4beSrobert // at the address pointed-to by the iterator, which requires an lvalue. 37*4bdff4beSrobert template <class _Ip> 38*4bdff4beSrobert concept __nothrow_input_iterator = 39*4bdff4beSrobert input_iterator<_Ip> && 40*4bdff4beSrobert is_lvalue_reference_v<iter_reference_t<_Ip>> && 41*4bdff4beSrobert same_as<remove_cvref_t<iter_reference_t<_Ip>>, iter_value_t<_Ip>>; 42*4bdff4beSrobert 43*4bdff4beSrobert template <class _Sp, class _Ip> 44*4bdff4beSrobert concept __nothrow_sentinel_for = sentinel_for<_Sp, _Ip>; 45*4bdff4beSrobert 46*4bdff4beSrobert template <class _Rp> 47*4bdff4beSrobert concept __nothrow_input_range = 48*4bdff4beSrobert range<_Rp> && 49*4bdff4beSrobert __nothrow_input_iterator<iterator_t<_Rp>> && 50*4bdff4beSrobert __nothrow_sentinel_for<sentinel_t<_Rp>, iterator_t<_Rp>>; 51*4bdff4beSrobert 52*4bdff4beSrobert template <class _Ip> 53*4bdff4beSrobert concept __nothrow_forward_iterator = 54*4bdff4beSrobert __nothrow_input_iterator<_Ip> && 55*4bdff4beSrobert forward_iterator<_Ip> && 56*4bdff4beSrobert __nothrow_sentinel_for<_Ip, _Ip>; 57*4bdff4beSrobert 58*4bdff4beSrobert template <class _Rp> 59*4bdff4beSrobert concept __nothrow_forward_range = 60*4bdff4beSrobert __nothrow_input_range<_Rp> && 61*4bdff4beSrobert __nothrow_forward_iterator<iterator_t<_Rp>>; 62*4bdff4beSrobert 63*4bdff4beSrobert } // namespace ranges 64*4bdff4beSrobert 65*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 66*4bdff4beSrobert 67*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 68*4bdff4beSrobert 69*4bdff4beSrobert #endif // _LIBCPP___MEMORY_CONCEPTS_H 70